Method for preparing anode copper ball and apparatus thereof

Abstract

The invention supplied a preparation method of anode copper ball. It includes the raking, rolling, drawing, and straightening to the copper cog rod; then it is stamped to the ball; the stamped anode copper ball is processed deoiling, polishing, and cleaning. The deoiling and polishing technology are that the anode copper ball and the composite polishing agent are mixed to put into the turning gear to do rotation process. The cleaning technology includes pre-cleaning and formal cleaning. The pre-cleaning is that the water is entered into the turning gear, and the turning gear is working to clean the anode copper ball. The formal cleaning is that the precleaned anode copper ball is heated up to clean by the sprinkling of the hot water. an anode copper ball preparation facility includes bundled bar copper rod automatic paying out machine, grinding nose machine, butt-weld machine, continuity raking machine, tandem mill, tandem drawing machine, wire-rewinding machine, automatic synchronization straightening machine, cold heading machine, polishing machine, and cleaning drying machine, and so on. The invention can obviously improve the appearance quality and inherent quality of the anode copper ball product, suit to large scale and high efficiency production.

Description

technical field [0001] The invention relates to non-ferrous metal calendering processing and cold heading ball forming technology, in particular to a method for preparing an anode copper ball and a device thereof. Background technique [0002] Anode copper products are a new type of copper-phosphorus alloy material developed in the past ten years. They are mainly used as anode materials for circuit connection of printed circuit boards and electroplating on the surface of circuit boards. They are one of the basic materials for electronic information manufacturing. At present, the ball forming technology at home and abroad usually adopts horizontal continuous casting billets, which are cut into strips and then directly cold-headed into balls; the production process of the products is relatively simple, but the surface of the product balls is prone to serious orange peel (concave-convex wrinkle) and ring. With irregularities, it is difficult to realize continuous production, an...

AI Technical Summary

Problems solved by technology

At present, the ball forming technology at home and abroad usually adopts horizontal continuous casting billets, which are cut into strips and then directly cold-headed into balls; the production process of the products is relatively simple, but the surface of the product balls is prone to serious orange peel (concave-convex wrinkle) and ring. With irregularities, it is difficult to realize continuous production, and the labor productivity and effective metal utilization rate are low. At the same time, the internal structure of the product is not dense enough, and the surface quality and internal quality cannot meet the requirements of high-quality circuit board plating. Point discharge and inhomogeneity are generated, resulting in rough, foggy and dull surface of the circuit board; at the same time, the adhesion on the casting surface is not easy to remove, and it is easy to cause the adhesion to be pressed into the copper ball, resulting in the increase of anode mud in the electroplating tank of the printed circuit board , affecting the quality of electroplating of circuit boards and the increase of production costs

Such products are generally suitable for the production of single-sided and double-sided printed circuit boards, but cannot meet the production requirements of high-performance multilayer circuit boards

In the invention patent application with the patent application number 02124991.1, "a production method of PC anode copper balls" is provided. This method simply introduces the performance of improving the strength, hardness and surface finish of the billet in order to promote grain breaking and refinement. , the copper billet rod needs to be processed into balls after peeling, cold rolling, drawing, straightening, etc., but the process of implementing each processing step is not introduced in detail, resulting in unclear technical solutions, especially the program It only involves the continuous processing of single disc element copper billet rods, and does not mention the process of continuous processing of connecting different disc element copper billet rods; and the above method only mentions technical measures to improve the strength, hardness and surface finish of the billet rods , the more important technical content of improving the surface quality of the anode copper ball product formed after heading is not involved, and the surface quality of the finally formed anode copper ball has a crucial impact on the normal use of the product (such as As mentioned earlier, it may cause tip discharge and unevenness, resulting in poor surface quality of the circuit board)

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